Feeding device for screw-machines



1. D. CHOSSLEY.

FEEDINGDEVICE FOR SCREW MACHINES.

' APPLICATION FILED MAY I, 1919.

1,367,589. Patented Feb. 8, 1921.

III

. lill! [im IIIIIII vl .v III. II" III Il Il! .Iv.I.II I .III IIII v n II I I INPI mmm III Il I I: I rIIII: I IEIIIMN. A n vil/ A1 ,Q .N .N $1mv I f QW@ PATENT OFFICE.

JESSE D. CROSSLEY, 0F BEDFORD, MICHIGAN.

FEEDING- DEVICE FOR SCREW-MACHINES.

Application filed May 1, 1919.

,ofoperations on a piece of work include a tubular or hollow spindlethrough which the piece of work may be intermittently advanced and fed.so that a portion ofthe piece of work will be presented for an 01o-,

eration, may be cut off and then another portion of a piece of workadvanced for another operation. To accomplish this the tubular or hollowspindle of the machine includes a clutch and a pushing device, both ofwhich are disposed andoperated in timed relation for advancing andholding a piece of work. Associated with these devices is ordinarily agripping device for the piece of work which consists of a tube throughwhich the piece of work is shifted, said tube having the ends thereofslitted or bifurcated to provide resilient arms that frictionally engagethe piece of Work and prevent accidental displacement thereof in thetube. The resilient arms, due to constant use. soon lose their grippingpower and must be repeatedly tempered or otherwise repaired, thusrequiring considerable labor and time, besides interfering withoperations being expeditiously carried on due to the fact that a pieceof work will often slip in the gripping device.

The object of my invention is to provide a novel automatic feedingdevice that mayv be readily substituted for the gripping devicementioned above. and this is accomplished without material change ormodification in the usual automatic machine. My feeding device ispositive in its operation, free from injury by ordinary use., and highlyefficient for expediting operations in connection with an automaticmachine.

The construction of the feeding devicefas associated with other parts ofa. spindle of an automatic machine will be hereinafter specificallydescribed and then claimed, and

Specification of Letters Eatent.

Patented Feb.. 8, 1921..

serial no. 293,934. [i

reference will now be had to the drawing, wherein- Figure 1 is alongitudinal sectional view of the spindle of an automatic machine,provided with a feeding device in accordance 'with my invention, thedevice being shown in elevation;

Fig. 2 is an enlarged longitudinal sectional view of the device; i

Fig. 3 is a cross sectional view taken on the line III--III of Fig. 2;

Fig. 4 is a perspective view of a detached gripping member; a

Fig. 5 is a side elevation of a modified form of spindle, provided withthe device, said spindle being partly broken away and partly in section,and

Figs. 6 and 7 are cross sectional views of vthe device illustratingmembers adapted for pieces of work of different cross-sectional shape.

In order that the position and use of my feeding device may beunderstood in connection with the spindle of an automatic machine, Ihave deemed it necessary to show a tubular spindle 1 as journaled in thebearing 2 of an automatic machine. The outer end `of the tubular spindle1 has a chuck including a nose piece 3 and a collet o'r chuck members 4which when contracted is adapted to grip and hold a piece of work 5axially of the spindle 1, said piece of work in this instance being arod that may be fed or intermittently advanced through the spindle 1 sothat the outer end of the rod may have operations performed thereon.

In the spindle 1 is a chuck sleeve 6 abutting the collet or chuckmembers .4 and adapted to shift the same against the nose piece 3 andcontract the collet or chuck members about the piece of work. The innerendof the chuck sleeve 6 is engaged by a head 7 actuated by pivotedfingers 8 in a holder 9. and said fingers are shifted by a cam 10slidable on the inner end of the spindle 1 and actuated through themedium of a lever 11. The lever 11 may be shifted to impart movementtothe fingers 8, the head 7. the sleeve 6 and the collet or chuckmembers 4, so that the piece of work may be i the medium i he opemcedoiihei .c 1 i'. ".54 "i1 feieience eo n, wid he i end oi "d device isconnected he ont@ che jonshcv sieeve 'i2 1 civ; oil che e couch sieeve 6ino coiiei Mv iinipioved device inhuiziif housing1 i@ have i heifeoilveduced `end i cif'io'iij scievv needed5 es of@ i?, so ghwb n3 inc v oesciceived coinpiises zi ie oniev end oii ldie oushev sieeve 12 es esiseen Figi 2. The oui/ei end o' es oc iq sind edjnshehijv mounted'heicein is ehntinen meirnhei "i9 having; A-l'he innei' end idieieoi3invveidiy heveied. es 20.

ifdidehie in Jehe housingn 'i6 is o coihii". 21 pirovided with a coniczdon heveied end 225 end inieiposed between seid coiiei eind Jehe innenend of the -housinf ,n is si coiied coinpression sioving 23 piovidino;sofiicienv cien:- ence foi ehe piece of vvovh 5 so the piece oi vfovhmay entend iniediv of ehe housing. The inner end o 'che coinpvessionsioiilizo` Q3 hees against e Wem Washer oi pieve Qd; rfind :'heexpensive iioice oi seid sioing;1 noivnaiiv hoids ehe coihn" 2iedvainced eo'weid "ehe ehni'nienh nienohev i9? end Toevnfii'cs of checoiioif receding".

iiniei'ioosed he'iveen 'the eihn'fcineni; niemher 19 gdnd the coihiif Qience ivfo ioose semiv cvi-indiriced winning `:o'ieinhevs Q5 having jcheinneih ends theveoji heveied as 26S to enn @gege 'she conical oi heveiedend 22 of the eolien 2L While the ouef ends of Jche gripping noem ens 25ave iconndech :is 279 and picovided vviih grinning edges Q8. F'ihe,qiipiinp inemheics 25 eve ioose Within the housing: so seid grippingnieinhens inev ein'ifoineicziiiy adjust themselves ieio'hive eo chepiece of ivoih 5., 'thai is when he housino" 16 is shifted, forward feoadvance e piece of vvorh5 the grinning ineinhefs assume position zu? anangie to "ehe piece oi Work and hv hiiing1 into 'ehe "piece of ivoihcause ii 'io 'moved with ehe housing'. The giin oingln devices sivewronged so that lhe ciosing` of ihe chuck hohes piece when. ce#

ce e innev eno.-

ecnin ciosed and che iced inhe he is zib Jche n. Then Jo-he chocieinheifs 'ineieiv sii@ on ie ietnin inovenen; of

is duing; this nioveme endenoy foi che eoiizi the ends of 4die .@iijpiiv 1. inhefs vvonio it? is die e chuchY open i ifesisonce of ehe gripp fpiece o" WeilT is suies ehe ioivevd nievehe echiiig ihioiggh @he losepove'foe 'ehe ends 2o of 'the inemheivs piece oi i iL-ei with iig.seeing gives jviei hng; ociionl end cmiipensoies foi" the iveei of 4theend mis continues iineii the 'ovivmd inovcinen is conioieed end 'bhechuck is ieeuins io sometime ioosiiion.

shown in Figs. 6 end 79 lche gripping ineinheis indy he ohheif shzipeschen semicviindiicei so es io qiip 1pieces of Woick of differentcnoss-sec'ionsii avea oi A sighi; modification of in v invention isiihlstnnted in 5., vvheiein o nnshef sieeve has is outev end constiucied:is ec 30, 4to vecconiinodate e siio feeding device in accordance vviihmy invenion, Whevees in Jehe pieieeisfed ioim of cons'cucition cheneedingq device mov he inode as zi nnii; and the usufii nusheic seeveremoved and eide-pfeed #ce receive the device es e unit.

nvoin 4che ifoieegvoine"q it vviii he ohsevved hhec "che inner feedingdevice vviii -copevete "with che chuck in positiveiv hoidino e piece ofivovii: psiiicniei'ljv when he -piece of Woi veeches its innenexizifeiniv end is shout io ness oni; of engogemenh with 'che vvovhheide?. TAWith ihe inner feeding de vice ve v close co ishe chuch :iveiv sinedi "piece oiE vvoich een he heid so "thee opemtions can hese'feiv pevfoi'ined Jdoeiceonu and vvhiie ii heve heiein shown thepi'eierved einhodi nienis for accomplishing his i'esiiiq is fao heiindevs'ood that 'the sfciiuciunai eienieni-s eve suscepihie to suchchanges as fedi vviihin che sco'oe of Jche appended cieiins.

L feeding device iioc ehe piivpose spec 7"? onine?? ends "thereofiuiciiinied on ,seid ehuio meint member, end the inner ends 'thereofbeveled, and e spring pressed collar engaging the inner beveled ends ofsaid gripping members and adapted to seperate seid beveled ends to shirtseid gripping members relative to seid abutment member.

2. A feeding device for the purpose speciiied comprising ieosesemi-eyiindricei gripping members having gripping edges adapt- 10 ed toembrace and engage e piece or' Work, en

abutment member against Which the eurer ends of seid gripping membersengage, e coller adapted ro change the position of seid gripping membersby separating tbe inner l5 ends of seid gripping members, and ineensinclosing said coller, gripping 'members end ebutmenrJ member.

8. The combination of e pusher sleeve,

self adjusting semi-Cylindrical gripping.

members ai; the end of said sleeve adapted ro embrace e piece of Werk9and means engeving the ends of seid gripping members adapted to changethe enguinrity thereof when the piece of Work is sbifited.`

in testimony Wbereoi i affix my signature in the presence of mvoWitnesses.

JESSE D. CROSSMEY. TiWirnesses KARL H. BUTLER, ANNA M., @one

